Power-hammer



(No Model.)

H. ST. LAWRENCE.

POWER HAMMER.

1 Patented Mar. 13

INVENTOR BY uh hm,

ATTORNEYS.

ETEHS. "IMO-Maps. Wm, B. C.

UNITED STATES PATENT OFFICE.

HENRY ST. LAWRENCE, OF NORTHAMPTON, MASSACHUSETTS.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 379.340, dated March 13. 1888.

Application filed May 28, 1887. Serial No. 239,686. (No model.)

To all whom it may concern.-

Be it known that I, HENRY ST. LAWRENCE, of Northampton, in the county of Hampshire and State of Massachusetts, have invented a new and Improved Power-Hammer, of which the following is a full, clear, and exact description.

This invention relates to a novel form of power-hammer, the principal objects of the invention being to relieve the main support ing-frame from the shock incident to the fall of the hammer stock and to provide for a yielding connection between the hammer-stock and its crank-yoke.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a face view of my improved form of power-hammer. Fig. 2 is a central sectional elevation taken on line 1} y of Fig. 1; and Fig. 3 is a cross-sectional view taken on line :0 m of Fig. 2.

In the drawings, represents the base of the main supporting-frame, whichframe consists of two forwardly-extending standards, 11, that are bolted to the base 10 by bolts 12, the standards being formed with shoulders 13, which rest upon the upper edge of the base and being connected by a cross-bolt, 2, which passes through the two standards to the rear of the hammerstock. The standards 11 are formed with upper forwardly-extending arms, 14, upon which there is mounted a crank-shaft, 15, that is provided with a driving-pulley, 16, and a balance-wheel, 17.

To the crank 18 of the shaft I connect a rod, 19, to which in turn there are connected two downwardly and outwardly extending bifurcated arms, 20, these arms being connected to the rod 19 by bolts 21, that are engaged by winged or handled nuts 22, the bolts 21 passing through elongated slots 3, that are formed in the rod 19, the arrangement being such that the arms may be adjusted toward or from the crank-shaft.

The hammer-stock 23 is mounted in vertical ways 24 and is connected to the bifurcated arms 20 by means of flexible strips 25. These strips 25 pass about pins or bolts 26, that are carried by the bifurcated ends of the arms 20,

and are held to a pin or bolt, 27, that is carried by the hammer-stock, by clips 28, that are formed with serrated faces 29 and outturued ends 30, the two clips being united by bolts 31. The pin or bolt 27 is preferably surrounded by a flexible cushion, 6, or, if desired, a single flexible strip could be employed, and this strip could be passed about the pins or bolts 26 and 27 and its ends united by the clips 28.

In the lower face of the hammer stock I form a dovetail groove, 32, in which the correspondingly'shaped projection 33 of the hammer 34 fits, the hammer being held in rigld connection with its stock by means of a wedge, 35, which is drivenin between one of the faces of the projection 33 and one of the definingwalls of the groove 32.

Beneath the hammer I mount the anvil 40, which is held to its stock 41 by means of a wedge, 42, the anvil being formed with a pro jection, 43, which fits within a dovetail groove, 44, that is made in the upper face of the stock 41, and the stock in turn is supported by a base, 45, said base being formed with a dovetail groove, 46, in which a projection, 47, formed on the under face of the stock 41 fits, a retaining-wedge, 48, being employed to bind the parts together. To prevent the lateral displacement of the base 45, I connect said base with the base 10 by means of a bolt, 50, which passes through an aperture formed in the base 45, and through a vertical slot, 51, that is formed in the base 10, a washer, 53, which overlaps the slot 51, being arranged between the base 10 and the nut 54 of the bolt 50.

The machine is to be run by a belt which engages the pulley 16, and the action of this belt is controlled by any of the ordinary forms of beltcontrolling attaehments-such, for instance, as the one illustrated in the drawings. In practice I prefer that the strips 25 should be made of leather; but any other proper flexible material would do as well.

From the construction described it will be seen that the lateral adjustment of the anvil may be obtained by shifting the stock 41, and that a forward or backward adj ustment' of either the anvil or the hammer may be obtained by loosening their retaining-wedges and moving them within their stocks.

In operation the connection of the hammer- IOC stock is such that the hammer will deliver a swinging yielding blow, the shock of which is taken up by the independent base 45, the base of the main frame being relieved of all undue shock and jar owing to the formation of the vertical slot 51, through which the bolt 50 passes.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. In a power-hammer, the combination, with a hammer-stock, ofa crank-shaft, a connectingrod carried by the crank-shaft, arms connected to the connecting-rod, flexible strips connected to the arms and to the hammerstock, and clips by which the last-named connection is established, substantially as described.

2. In a powenhammer, the combination, with a hammerstock, of a crank-shaft, a connectingrod carried by the crankshaft, arms connected to the connecting-rod, flexible strips 25, clips 28, formed with serrated faces 29, and bolts 31, the strips 25 being connected to the 4. In a power-hammer, the combination,

with a hammer-stock base and frame, said base being formed with a vertical slot, 51, of an anvil -stock base, and a bolt which passes through an aperture in the anvil-stock base and through the vertical slot of the hammerstock base, substantially as described.

HENRY ST. LAIVRENOE. Witnesses:

J osEPH P. HEBERT, GEORGE W. CLARK. 

